Extreme Weather Links Arctic Population Cycles (4 of 5) (image) American Association for the Advancement of Science Share Print E-Mail Caption This shows wild Svalbard reindeer and Svalbard rock ptarmigan co-feeding on an ice-free ridge in late winter. This image relates to a paper that appeared in Jan. 18, 2013, issue of Science, published by AAAS. The paper, by Brage Hansen at Norwegian University of Science and Technology in Trondheim, Norway, and colleagues was titled, "Climate Events Synchronize the Dynamics of a Resident Vertebrate Community in the High Arctic." Credit [Image courtesy of Nicolas Lecomte, Norwegian Polar Institute] Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.